/// <summary>Gets the root directory information of the specified path.</summary>
/// <returns>A string containing the root directory of <paramref name="path" />, such as "C:\", or null if <paramref name="path" /> is null, or an empty string if <paramref name="path" /> does not contain root directory information.</returns>
/// <param name="path">The path from which to obtain root directory information. </param>
/// <exception cref="T:System.ArgumentException">
/// <paramref name="path" /> contains one or more of the invalid characters defined in <see cref="M:System.IO.Path.GetInvalidPathChars" />.-or- <see cref="F:System.String.Empty" /> was passed to <paramref name="path" />. </exception>
/// <filterpriority>1</filterpriority>
public static string GetPathRoot(string path)
{
if (path == null)
{
return(null);
}
if (path.Trim().Length == 0)
{
throw new ArgumentException("The specified path is not of a legal form.");
}
if (!Path.IsPathRooted(path))
{
return(string.Empty);
}
if (Path.DirectorySeparatorChar == '/')
{
return((!Path.IsDsc(path[0])) ? string.Empty : Path.DirectorySeparatorStr);
}
int num = 2;
if (path.Length == 1 && Path.IsDsc(path[0]))
{
return(Path.DirectorySeparatorStr);
}
if (path.Length < 2)
{
return(string.Empty);
}
if (Path.IsDsc(path[0]) && Path.IsDsc(path[1]))
{
while (num < path.Length && !Path.IsDsc(path[num]))
{
num++;
}
if (num < path.Length)
{
num++;
while (num < path.Length && !Path.IsDsc(path[num]))
{
num++;
}
}
return(Path.DirectorySeparatorStr + Path.DirectorySeparatorStr + path.Substring(2, num - 2).Replace(Path.AltDirectorySeparatorChar, Path.DirectorySeparatorChar));
}
if (Path.IsDsc(path[0]))
{
return(Path.DirectorySeparatorStr);
}
if (path[1] == Path.VolumeSeparatorChar)
{
if (path.Length >= 3 && Path.IsDsc(path[2]))
{
num++;
}
return(path.Substring(0, num));
}
return(Directory.GetCurrentDirectory().Substring(0, 2));
}
private static string GetServerAndShare(string path)
{
int num = 2;
while (num < path.Length && !Path.IsDsc(path[num]))
{
num++;
}
if (num < path.Length)
{
num++;
while (num < path.Length && !Path.IsDsc(path[num]))
{
num++;
}
}
return(path.Substring(2, num - 2).Replace(Path.AltDirectorySeparatorChar, Path.DirectorySeparatorChar));
}
private static bool SameRoot(string root, string path)
{
if (root.Length < 2 || path.Length < 2)
{
return(false);
}
if (!Path.IsDsc(root[0]) || !Path.IsDsc(root[1]))
{
return(root[0].Equals(path[0]) && path[1] == Path.VolumeSeparatorChar && (root.Length <= 2 || path.Length <= 2 || (Path.IsDsc(root[2]) && Path.IsDsc(path[2]))));
}
if (!Path.IsDsc(path[0]) || !Path.IsDsc(path[1]))
{
return(false);
}
string serverAndShare = Path.GetServerAndShare(root);
string serverAndShare2 = Path.GetServerAndShare(path);
return(string.Compare(serverAndShare, serverAndShare2, true, CultureInfo.InvariantCulture) == 0);
}
private static string CanonicalizePath(string path)
{
if (path == null)
{
return(path);
}
if (Environment.IsRunningOnWindows)
{
path = path.Trim();
}
if (path.Length == 0)
{
return(path);
}
string pathRoot = Path.GetPathRoot(path);
string[] array = path.Split(new char[]
{
Path.DirectorySeparatorChar,
Path.AltDirectorySeparatorChar
});
int num = 0;
bool flag = Environment.IsRunningOnWindows && pathRoot.Length > 2 && Path.IsDsc(pathRoot[0]) && Path.IsDsc(pathRoot[1]);
int num2 = (!flag) ? 0 : 3;
for (int i = 0; i < array.Length; i++)
{
if (Environment.IsRunningOnWindows)
{
array[i] = array[i].TrimEnd(new char[0]);
}
if (!(array[i] == ".") && (i == 0 || array[i].Length != 0))
{
if (array[i] == "..")
{
if (num > num2)
{
num--;
}
}
else
{
array[num++] = array[i];
}
}
}
if (num == 0 || (num == 1 && array[0] == string.Empty))
{
return(pathRoot);
}
string text = string.Join(Path.DirectorySeparatorStr, array, 0, num);
if (!Environment.IsRunningOnWindows)
{
return(text);
}
if (flag)
{
text = Path.DirectorySeparatorStr + text;
}
if (!Path.SameRoot(pathRoot, text))
{
text = pathRoot + text;
}
if (flag)
{
return(text);
}
if (!Path.IsDsc(path[0]) && Path.SameRoot(pathRoot, path))
{
if (text.Length <= 2 && !text.EndsWith(Path.DirectorySeparatorStr))
{
text += Path.DirectorySeparatorChar;
}
return(text);
}
string currentDirectory = Directory.GetCurrentDirectory();
if (currentDirectory.Length > 1 && currentDirectory[1] == Path.VolumeSeparatorChar)
{
if (text.Length == 0 || Path.IsDsc(text[0]))
{
text += '\\';
}
return(currentDirectory.Substring(0, 2) + text);
}
if (Path.IsDsc(currentDirectory[currentDirectory.Length - 1]) && Path.IsDsc(text[0]))
{
return(currentDirectory + text.Substring(1));
}
return(currentDirectory + text);
}
internal static string InsecureGetFullPath(string path)
{
if (path == null)
{
throw new ArgumentNullException("path");
}
if (path.Trim().Length == 0)
{
string text = Locale.GetText("The specified path is not of a legal form (empty).");
throw new ArgumentException(text);
}
if (Environment.IsRunningOnWindows)
{
path = Path.WindowsDriveAdjustment(path);
}
char c = path[path.Length - 1];
if (path.Length >= 2 && Path.IsDsc(path[0]) && Path.IsDsc(path[1]))
{
if (path.Length == 2 || path.IndexOf(path[0], 2) < 0)
{
throw new ArgumentException("UNC paths should be of the form \\\\server\\share.");
}
if (path[0] != Path.DirectorySeparatorChar)
{
path = path.Replace(Path.AltDirectorySeparatorChar, Path.DirectorySeparatorChar);
}
path = Path.CanonicalizePath(path);
}
else
{
if (!Path.IsPathRooted(path))
{
path = Directory.GetCurrentDirectory() + Path.DirectorySeparatorStr + path;
}
else if (Path.DirectorySeparatorChar == '\\' && path.Length >= 2 && Path.IsDsc(path[0]) && !Path.IsDsc(path[1]))
{
string currentDirectory = Directory.GetCurrentDirectory();
if (currentDirectory[1] == Path.VolumeSeparatorChar)
{
path = currentDirectory.Substring(0, 2) + path;
}
else
{
path = currentDirectory.Substring(0, currentDirectory.IndexOf('\\', currentDirectory.IndexOf("\\\\") + 1));
}
}
path = Path.CanonicalizePath(path);
}
if (Path.IsDsc(c) && path[path.Length - 1] != Path.DirectorySeparatorChar)
{
path += Path.DirectorySeparatorChar;
}
string text2;
if (MonoIO.RemapPath(path, out text2))
{
path = text2;
}
return(path);
}
